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BEGIN:VEVENT
SUMMARY:Jesse Woods (University of Bern)
DTSTART:20250919T070000Z
DTEND:20250919T080000Z
DTSTAMP:20260515T120012Z
UID:EUPAC-TP/3
DESCRIPTION:Title: Defining QFT Categorically I\nby Jesse Woods (University of Be
rn) as part of Europe and Pacific Theoretical Physics\n\n\nAbstract\nIn pr
eparation to study Generalised (Categorical) Symmetries\, we provide motiv
ation and give an introduction to some very basic\, but relevant\, concept
s in Category Theory. We will introduce monoidal categories before showing
that the expected properties of Topological Quantum Field Theory follow n
aturally from a categorical definition. We compute some basic results of T
QFT to demonstrate the utility of categories in physics.\n
LOCATION:https://stable.researchseminars.org/talk/EUPAC-TP/3/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Jonathan Skelton (University of Sydney)
DTSTART:20250926T070000Z
DTEND:20250926T080000Z
DTSTAMP:20260515T120012Z
UID:EUPAC-TP/5
DESCRIPTION:Title: Symmetries as Topological Operators\nby Jonathan Skelton (Univ
ersity of Sydney) as part of Europe and Pacific Theoretical Physics\n\n\nA
bstract\nIn this talk I'll discuss extended symmetry defect operators and
how they naturally arise from symmetries in the quantum theory.\n\nThe foc
us will be on ordinary symmetries\; these are referred to as 0-form topolo
gical group-like symmetries in the modern literature. First I will discus
s classical symmetries of Lagrangian field theory. In the second part I w
ill discuss their analogues in the quantised theory\, and outline and a sk
etch a proof of their properties.\n
LOCATION:https://stable.researchseminars.org/talk/EUPAC-TP/5/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Joey Faller (University of Queensland)
DTSTART:20251003T070000Z
DTEND:20251003T080000Z
DTSTAMP:20260515T120012Z
UID:EUPAC-TP/6
DESCRIPTION:Title: One-Form Symmetries and Confinement\nby Joey Faller (Universit
y of Queensland) as part of Europe and Pacific Theoretical Physics\n\n\nAb
stract\nGlobal symmetries\, traditionally understood to act on local opera
tors\, are a cornerstone of QFT. This talk provides a pedagogical introduc
tion to their generalisation: higher-form symmetries\; these act on non-lo
cal\, extended operators like Wilson lines. We will begin by showing how t
he concept of a conserved charge can be extended from 0-form to 1-form sym
metries and demonstrate that this framework is consistent with Noether's t
heorem.\n\nIn a gauge theory\, two principal types of 1-form symmetries ca
n emerge: a 'magnetic' symmetry of topological origin from the Bianchi ide
ntity ($dF=0$)\, and an 'electric' symmetry arising from the dynamical equ
ations of motion. It is this electric 1-form symmetry that provides a nove
l method to analyse confinement.\nThe primary application of this framewor
k is to show how the status of this 1-form symmetry\, whether it is sponta
neously broken or preserved\, precisely determines whether confinement is
present or not.\n
LOCATION:https://stable.researchseminars.org/talk/EUPAC-TP/6/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Adèle Le Borgne (University of Bern)
DTSTART:20251010T070000Z
DTEND:20251010T080000Z
DTSTAMP:20260515T120012Z
UID:EUPAC-TP/7
DESCRIPTION:Title: Landau-Ginzburg theory for 1-form symmetries\nby Adèle Le Bor
gne (University of Bern) as part of Europe and Pacific Theoretical Physics
\n\n\nAbstract\nTo conclude the first block of seminars on higher form sym
metry\, I will review the first four sections of $\\textbf{Mean string fie
ld theory: Landau-Ginzburg theory for 1-form symmetries}$ by Nabil Iqbal\,
John McGreevy.\n\n\n$\\textit{Abstract of the paper:}$ \n\nBy analogy wit
h the Landau-Ginzburg theory of ordinary zero-form symmetries\, we introdu
ce and develop a Landau-Ginzburg theory of one-form global symmetries\, wh
ich we call mean string field theory. The basic dynamical variable is a st
ring field – defined on the space of closed loops – that can be used t
o describe the creation\, annihilation\, and condensation of effective str
ings. Like its zero-form cousin\, the mean string field theory provides a
useful picture of the phase diagram of broken and unbroken phases. We prov
ide a transparent derivation of the area law for charged line operators in
the unbroken phase and describe the dynamics of gapless Goldstone modes i
n the broken phase. The framework also provides a theory of topological de
fects of the broken phase and a description of the phase transition that s
hould be valid above an upper critical dimension\, which we discuss. We al
so discuss general consequences of emergent one-form symmetries at zero an
d finite temperature.\n
LOCATION:https://stable.researchseminars.org/talk/EUPAC-TP/7/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Jonathan Skelton
DTSTART:20251017T070000Z
DTEND:20251017T080000Z
DTSTAMP:20260515T120012Z
UID:EUPAC-TP/8
DESCRIPTION:Title: Non-invertible Chiral Symmetry and the ABJ Anomaly\nby Jonatha
n Skelton as part of Europe and Pacific Theoretical Physics\n\n\nAbstract\
nIn this talk I will derive the chiral (ABJ) anomaly\, and briefly outline
its connection to non-invertible (generalised) symmetries.\n
LOCATION:https://stable.researchseminars.org/talk/EUPAC-TP/8/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Jesse Woods (University of Bern)
DTSTART:20251024T070000Z
DTEND:20251024T080000Z
DTSTAMP:20260515T120012Z
UID:EUPAC-TP/9
DESCRIPTION:Title: Degenerate Ground States\nby Jesse Woods (University of Bern)
as part of Europe and Pacific Theoretical Physics\n\n\nAbstract\nDespite t
heir common occurrence in our studies\, degenerate spectra are rare and sp
ecial. In this talk\, we will briefly sketch the argument of eigenvalue re
pulsion and explain why degenerate Hamiltonians are not the norm. We will
also demonstrate how familiar mechanisms for degeneracy fail in Quantum Me
chanics. Next\, anomalies will be discussed as an invariant for diagnosing
degeneracy. To conclude\, we will discuss projective representations and
how to realise anyon parastatics on the torus and the associated ground st
ate degeneracy\, to set the scene for future discussions on fusion\, anoma
lies\, and inflow.\n
LOCATION:https://stable.researchseminars.org/talk/EUPAC-TP/9/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Jesse Woods (University of Bern)
DTSTART:20251031T080000Z
DTEND:20251031T090000Z
DTSTAMP:20260515T120012Z
UID:EUPAC-TP/10
DESCRIPTION:Title: Anomalies and Inflow I\nby Jesse Woods (University of Bern) a
s part of Europe and Pacific Theoretical Physics\n\n\nAbstract\nWe introdu
ce anomalies as non-trivial fusions of symmetry defects. We introduce the
inflow mechanism and the mapping torus.\n
LOCATION:https://stable.researchseminars.org/talk/EUPAC-TP/10/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Jonathan Skelton
DTSTART:20251107T080000Z
DTEND:20251107T093000Z
DTSTAMP:20260515T120012Z
UID:EUPAC-TP/11
DESCRIPTION:Title: Anomalies and Inflow II\nby Jonathan Skelton as part of Europ
e and Pacific Theoretical Physics\n\nAbstract: TBA\n
LOCATION:https://stable.researchseminars.org/talk/EUPAC-TP/11/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Lukasz T. Stepien (University of the National Education Commission
\, Krakow)
DTSTART:20260327T080000Z
DTEND:20260327T090000Z
DTSTAMP:20260515T120012Z
UID:EUPAC-TP/17
DESCRIPTION:Title: Bogomolny equations for some field-theoretical models\nby Luk
asz T. Stepien (University of the National Education Commission\, Krakow)
as part of Europe and Pacific Theoretical Physics\n\n\nAbstract\nThe Bogom
olny equations\, if they can be derived for a given field-theoretical mode
l\, give a valuable chance for seeking topologically stable soliton soluti
ons for such model. I will present a method based on variational calculus\
, of deriving Bogomolny equations for some field-theoretical models\, and
certain solutions of these equations\, too.\n
LOCATION:https://stable.researchseminars.org/talk/EUPAC-TP/17/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Bartosz Pyszkowski
DTSTART:20260417T070000Z
DTEND:20260417T080000Z
DTSTAMP:20260515T120012Z
UID:EUPAC-TP/20
DESCRIPTION:Title: An Introduction to Double String Theory and Non-Riemannian Backgr
ounds\nby Bartosz Pyszkowski as part of Europe and Pacific Theoretical
Physics\n\n\nAbstract\nThis talk introduces Double Field Theory (DFT) in
the context of string theory\, with a focus on its application to "non-Rie
mannian" backgrounds following arXiv:2008.03084. As a case study\, we cons
ider a particular example in which the BRST cohomology simplifies\, contai
ning only states at the first excited level. We then briefly examine the c
onsistency of the theory by analyzing the modular invariance of the one-lo
op torus partition function. To keep the discussion pedagogical\, a brief
review of BRST quantization and modular invariance in string theory will b
e provided. No prior familiarity with DFT is assumed\, and all are welcome
.\n
LOCATION:https://stable.researchseminars.org/talk/EUPAC-TP/20/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Adèle Le Borgne (University of Bern)
DTSTART:20260515T071500Z
DTEND:20260515T081500Z
DTSTAMP:20260515T120012Z
UID:EUPAC-TP/29
DESCRIPTION:Title: Trapping-potential dependence of the unitary Fermi gas at the BCS
-BEC crossover\nby Adèle Le Borgne (University of Bern) as part of Eu
rope and Pacific Theoretical Physics\n\n\nAbstract\nCold-atom experiments
which measure Fermi-gas properties near unitarity confine fermionic atoms
to a region of space using trapping potentials of various shapes. The pres
ence of a trapping potential introduces a new characteristic physical scal
e in the superfluid EFT which\, inter alia\, describes the acoustic branch
of excitations in the far infrared well below the scale of the superfluid
gap. In this EFT there is a clear hierarchy of scales\, and corrections t
o the homogeneous system due to the trapping potential may be organized in
to three regions with distinct power counting that relies on both the EFT
derivative expansion\, and the WKB approximation\, which is an expansion i
n gradients of the trapping potential. The energy spectrum of the superflu
id system is obtained in each of the regions by explicit computation of th
e phonon-field fluctuations\, and by the modifications to the dynamic stru
cture factor due to the corresponding density fluctuations. The most signi
ficant deviations from linear dispersion due to the trapping potential are
found in the far infrared region of the superfluid EFT.\n
LOCATION:https://stable.researchseminars.org/talk/EUPAC-TP/29/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Jesse Woods (University of Bern)
DTSTART:20260522T070000Z
DTEND:20260522T080000Z
DTSTAMP:20260515T120012Z
UID:EUPAC-TP/30
DESCRIPTION:Title: Semiclassics at the Cusp\nby Jesse Woods (University of Bern)
as part of Europe and Pacific Theoretical Physics\n\n\nAbstract\nIn gauge
theory\, physical observables are inherently non-local and notoriously su
btle. Wilson loops play a central role in understanding non-perturbative p
henomena spanning high-energy and condensed matter physics. We explore the
recent results of arXiv:2604.15422. Using the semiclassical method of lar
ge charge\, we analytically determine the anomalous scaling dimension of W
ilson lines with cusps in the Abelian Higgs model to NNLO\, resumming pert
urbation theory in the quartic coupling at each order. This quantity encod
es rich physics: radiation from deflected particles\, defect fusion\, and
the superconducting phase transition. Our results interpolate between pert
urbative and large-charge regimes\, accessing domains that are invisible i
n fixed-order perturbation theory\, bridging perturbative and non-perturba
tive physics in strongly coupled CFTs.\n
LOCATION:https://stable.researchseminars.org/talk/EUPAC-TP/30/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Alessandro Duci (Milan Bicocca U)
DTSTART:20260605T070000Z
DTEND:20260605T080000Z
DTSTAMP:20260515T120012Z
UID:EUPAC-TP/31
DESCRIPTION:Title: SymTFT in Superspace\nby Alessandro Duci (Milan Bicocca U) as
part of Europe and Pacific Theoretical Physics\n\n\nAbstract\nWe propose
a manifestly supersymmetric formulation of the Symmetry Topological Field
Theory (SuSymTFT) for theories with supersymmetry. The SymTFT is a framewo
rk that helps organizing symmetries and anomalies of a QFT. Albeit a lot o
f activity in the field has been devoted to the construction of the SymTFT
for the bosonic symmetry structure\, the fermionic case has not been anal
yzed in detail. Here\, we consider the most prominent example of theories
exhibiting fermionic symmetries\, that is supersymmetric models. These are
most naturally formulated on supermanifolds\, where the supergeometry app
roach allows for a manifest organization of the symmetries according to th
eir fermionic grading. We provide the general construction of the SuSymTFT
as a super-BF theory living in a (n|m)-dimensional supermanifold and chec
k our proposal in two particular examples\, the compact and the chiral sup
er-bosons in two dimensions.\n
LOCATION:https://stable.researchseminars.org/talk/EUPAC-TP/31/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Zong-Zhe Du (University of Notthingham)
DTSTART:20260529T070000Z
DTEND:20260529T080000Z
DTSTAMP:20260515T120012Z
UID:EUPAC-TP/32
DESCRIPTION:by Zong-Zhe Du (University of Notthingham) as part of Europe a
nd Pacific Theoretical Physics\n\nAbstract: TBA\n
LOCATION:https://stable.researchseminars.org/talk/EUPAC-TP/32/
END:VEVENT
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